Here’s a game theory on a future monetary system based on a sovereign issued cryptocurrency, with a permissioned distributed ledger sponsored by China, Russia and the IMF, with a digital coin tied to the SDR for measure of value net of payments, and settled periodically in physical gold.

Alternate payment systems for global trade are being created right now, and could affect the US dollar very rapidly. Russia, China, Turkey, Iran and others are buying physical gold. When there’s no trust in the other party then there is gold.